CN102026469B - Single mandril spoke type superconductive accelerating cavity and manufacture method thereof - Google Patents
Single mandril spoke type superconductive accelerating cavity and manufacture method thereof Download PDFInfo
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- CN102026469B CN102026469B CN2010105963290A CN201010596329A CN102026469B CN 102026469 B CN102026469 B CN 102026469B CN 2010105963290 A CN2010105963290 A CN 2010105963290A CN 201010596329 A CN201010596329 A CN 201010596329A CN 102026469 B CN102026469 B CN 102026469B
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Abstract
The invention relates to a single mandril spoke type superconductive accelerating cavity and a manufacture method thereof. The accelerating cavity is characterized by comprising a cylindrical cavity barrel which is formed by punching and welding four arch plates, wherein a mandril hole is respectively formed on each of two opposite arch plates; a cleaning tube is respectively arranged on each of the other two opposite arch plates; one end of each cleaning tube positioned outside the cavity barrel is respectively connected with a flange; two ends of the cavity barrel are respectively provided with an end cover; the middle of the surface of each end cover is internally indented, and an end cover beam tube respectively penetrates through the middle of the surface of each end cover; the two end cover beam tubes are respectively connected with a flange; the mandril is arranged between the mandril holes in the cavity barrel; the mandril is a thin wall cavity, the middle section of the mandril is in a straight barrel shape, the two ends of the mandril are in symmetrical funnel shapes, and two funnel-shaped ports are correspondingly arranged in the two mandril holes; a center beam tube penetrates through the middle section of the mandril; and the center beam tube and the two end cover beam tubes are positioned in the same axis. In the accelerating cavity, a transverse electromagnetic wave mode is adopted for acceleration, and the requirements of high gradient, high efficiency, high acceptability, high stability and the like can be met. The accelerating cavity can be used for accelerating protons at full energy section.
Description
Technical field
The present invention relates to a kind of superconduction accelerating cavity and manufacturing approach thereof, particularly about a kind of single plug radial superconduction accelerating cavity (superconduction Spoke chamber) and manufacturing approach thereof that the high current proton is quickened of being used for.
Background technology
Along with the development of accelerator art, accelerator will be more and more widely in the application in fields such as scientific research, medical treatment, environmental protection, the energy and national defense safety.According to the demand in various different application field, various specification requirement has been proposed accelerator.Under the research demand of Accelerator Driven Subcritical reactor (ADS) promoted, high current proton straight line speed technology becomes was just needing one type of fast-developing accelerator art at present.This is main because it has irreplaceable advantage on nuclear fuel material utilization, nuclear waste disposal, nuclear power station safety congruence problem, and it is urgent to make that the demand of this speed technology becomes.And high current proton straight line quickens at aspects such as scientific research and national security wide application space is arranged.
Present proton linear acceleration apparatus still adopts the accelerator art of normal temperature.Because the own characteristic and the restriction of normal temperature speed technology, the thermal losses of accelerator is very big, especially takes the flotation tubes linear accelerator (DTL) of standing wave accelerating structure, and power utilization efficient is low; And because the limiting factor of normal temperature accelerator performance, under certain accelerating gradient required, pulse length and repetition rate that the normal temperature accelerator can quicken were limited, and it is strong that this has limited the line average flow that the normal temperature accelerator can quicken.
Because the limiting factor of normal temperature accelerator aspect above-mentioned, the acceleration of high current proton straight line need seek redress to radio frequency superconduction speed technology.Radio frequency superconduction speed technology is with its low chamber wall resistance, low-power consumption; Big beam aperture, the high degree of coupling, low tail field effect; And can help to solve the key issue of high current acceleration in long grand pulse even continuous wave mode advantage such as work down.Because when proton quickens; The β value of accelerated particle (particle's velocity is than the value of the light velocity) is less than 1; And can change along with the process of quickening; Therefore the length of each accelerating gap in the accelerating structure need be confirmed according to the β value of used acceleration section particle, quickens needed phase place requirement to satisfy.Oblate ellipsoid chamber by Institute of High Energy Physcis, Academia Sinica's design is exactly one type of superconduction proton accelerating structure, and is as shown in Figure 4.This oblate ellipsoid chamber is according to the ellipsoidal cavity that is used for β=1 that superelectron quickens, and designs through compression accelerating gap length and gets.Because this structure can cause in the chamber electromagnetic field energy storage space narrow and small, wall upward peak surface electrical magnetic field, chamber is very strong, therefore, and the stability in the time of can limiting accelerating gradient and the actual motion of superconductor cavity.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of single plug radial superconduction accelerating cavity (superconduction Spoke chamber) and manufacturing approach thereof that the high current proton is quickened of being used for.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of single plug radial superconduction accelerating cavity; It is characterized in that: it comprises the cylindrical cavity tube; Be symmetrically arranged with two plug holes on the barrel of said chamber tube, said two plug hole symmetries are equipped with two cleaning pipes at interval, and the end that two said cleaning pipes are positioned at the tube outside, said chamber connects a flange respectively; The two ends of said chamber tube are respectively arranged with an end cap; Middle part, the surface indent of two said end caps, the centre wears an end cap beam tube respectively, and two said end cap beam tubes pass two said end caps and connect a flange; Be provided with a plug between the two said plug holes in the tube of said chamber, said plug is a thin-walled chamber, and its interlude is straight tubular, and two ends are the infundibulate of symmetry, and two said funnel shaped ports correspondence respectively are arranged in the two said plug holes; The interlude of said plug wears a center beam tube, and said center beam tube and two said end cap beam tubes are positioned on the same axis.
Said chamber tube comprises two symmetrically arranged arc saddle transition faces and two symmetrically arranged arcuate flanks, and two said plug holes are separately positioned on the two said saddle transition faces, and two said cleaning pipes are separately positioned on the two said sides; Be respectively arranged with a chamber tube reinforcement between two saddle transition faces and the two sides,
On the said end cap beam tube in the two said end cap outsides, be arranged at intervals with some end cap reinforcements.
A kind of manufacturing approach like each said single plug radial superconduction accelerating cavity of claim 1～3; It may further comprise the steps: 1) adopt the RRR value greater than 300 High-purity Niobium materials; Produce two end caps through diel; Two arc saddle transition faces of chamber tube and two arcuate flanks, and two thin-walled chamber sheets forming plug; 2) go out two cleaning pipes, a center beam tube, two end cap beam tubes, four flanges with machined into; Some chambeies tube reinforcement and end cap reinforcement are accomplished in the line cutting; 3) use ultrasonic cleaning equipment, to through step 1) and 2) part accomplished carries out ultrasonic cleaning, and scavenging period is not less than 40 minutes; 4) adopt hydrofluoric acid, nitric acid, phosphoric acid to press the mixed acid of 1: 1: 2 volume ratio composition, the part of accomplishing in the step 3) is carried out chemical cleaning; The acid liquor temperature of chemical cleaning is controlled in 20 ℃, and scavenging period is 10～40 minutes; 5) be not less than the ultra-pure water cleaning step 4 of 16M Ω cm with resistivity) in the part accomplished, and in being superior to 1000 grades clean room, dry; 6) utilize vacuum electron beam welder that the part that obtains through step 5) is welded, the operating voltage of vacuum electron beam welder is 60KV, and operating current is 5～50mA; Welding may further comprise the steps: (1) with the two end cap beam tube respectively correspondence be welded on the two end cap; (2) two thin-walled chamber sheets are welded into plug, simultaneously with center beam tube and plug welding; (3) the two ends correspondence of plug is welded on the place, plug hole of two saddle transition faces of chamber tube; (4) with two the saddle transition faces and the two sides welding of cored bar, accomplish the chamber tube; (5) two end cap is welded on the two ends of chamber tube respectively, forms cavity; (6) two cleanings are managed corresponding respectively being welded on the two sides of chamber tube; (7) chamber tube reinforcement is welded on the weld of two saddle transition faces and two sides respectively; The end cap reinforcement is welded on respectively on two end cap and the two end cap beam tube; (8) flange is welded on respectively on two cleaning pipes and the two end cap beam tube; 7) make completion.
The present invention is owing to take above technical scheme; It has the following advantages: the present invention is divided into four with the chamber tube; Punching press respectively, and be welded into complete urceolus, and carry out turned welt and welding after also unconventional integral body rolls the chamber tube; The advantage of doing like this is: 1, reduce the weld seam quantity of magnetic field peak region, reduce the possibility that pyromagnetic quench takes place in the present invention when operation.2, for the welding between plug and the saddle transition face, can carry out through inner surface in the chamber, because the front of electron beam welding is shaped than the relatively easy control of back-welding shape, can improve the pattern of this part chamber wall inner surface.3, reduced the manufacturing procedure of cleaning mouthful two place's turned welts, can once accomplish, reduced cost through punching press.The present invention quickens through adopting transverse electromagnetic mode (TEM Mode); Can satisfy demands such as high gradient that high current proton straight line quickens, high efficiency, high acceptance, high stability, can be used for quickening from β approximate 0.1 to β=1, the almost proton of all-round section of energy from 2.5MeV to the GeV magnitude.
Description of drawings
Fig. 1 is a perspective view of the present invention
Fig. 2 is the vertical profile cross-sectional schematic of Fig. 1
Fig. 3 is that each workpiece of the present invention splits sketch map
Fig. 4 be in the prior art oblate ellipsoid chamber along the generalized section of axis
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
Like Fig. 1, shown in Figure 2, the present invention includes a cylindrical cavity tube 1, chamber tube 1 is made up of two symmetrically arranged saddle transition faces and two symmetrically arranged sides.Be respectively arranged with on the two symmetrically arranged saddle transition faces on 2, the two symmetrically arranged sides, a plug hole and be respectively arranged with a lancing door, two lancing doors connect the end that a cleaning pipe 3, two cleaning pipes 3 are positioned at chamber tube 1 outside respectively and connect a flange 4 respectively.The two ends of chamber tube 1 are respectively arranged with an end cap 5, form a cavity with chamber tube 1.Middle part, the surface indent of two end cap 5, the centre is respectively arranged with a beam tube hole.After connecting respectively in the two beam tube holes that 6, two end cap beam tubes 6 of an end cap beam tube are corresponding respectively and passing the beam tube hole on the two end cap 5, connect a flange 7, can be connected with external device through flange 7.Be provided with a plug 8 between two plug holes 2 in the chamber tube 1; Plug 8 is a thin-walled chamber, and its interlude is straight tubular construction, and two ends are the funnel-shaped structure of symmetry; The port of two funnel-shaped structures is corresponding respectively to be arranged in the two plug holes 2 of chamber tube 1, forms accelerating cavity 9 between cavity and the plug 8.The interlude of plug 8 wears and is fixed with a center beam tube 10 (as shown in Figure 3), and center beam tube 10 is positioned on the same axis with two end cap beam tube 6.
As shown in Figure 3, in the foregoing description, the two saddle transition faces and the two sides of chamber tube 1 are arc 11; Chamber tube 1 is outer, be provided with a chamber tube reinforcement 12 (as shown in Figure 1) between adjacent two arcs 11, and chamber tube reinforcement 12 is used to strengthen the mechanical strength and the stability of cavity.
As shown in Figure 1; In the foregoing description, on the two end cap beam tube 6 in end cap 5 outsides, be arranged at intervals with some mechanical strengths and stable rectangular trapezoidal end cap reinforcement 13 that are used to strengthen cavity; Each end cap reinforcement 13 is the center with end cap beam tube 6; Be divergent shape and distribute, its right-angle side is fixed on the end cap beam tube 6, and hypotenuse is fixed on the end cap 5.
In the foregoing description, the end cap 5 at chamber tube 1 and its two ends, and plug 2; End cap beam tube 6; Cleaning pipe 3, center beam tube 10 adopts the High-purity Niobium material to process, and reinforcement 12 and 13 adopts general niobium material to process; And each flange is considered sealing and to the requirement of the hardness and the toughness of material, adopt the niobium titanium alloy manufacturing.
The present invention quickens through adopting transverse electromagnetic mode (TEM Mode), can optimize to obtain accelerating cavity physical parameter preferably, thereby satisfy demands such as high gradient that high current proton straight line quickens, high efficiency, high acceptance, high stability.And according to the difference of design, can be used for quickening from β approximate 0.1 to β=1, the almost proton of all-round section of energy from 2.5MeV to the GeV magnitude.
Internal structure of the present invention is complicated, and adopts thin-wall construction, and whole cavity need be disassembled to a plurality of parts, processes separately, is combined together through welding assembly and forms complete accelerating structure.The present invention adopts superconductor, in order not influence the rerum natura of superconductor, consequently influences the final performance of superconductor cavity, need carry out operations such as ultrasonic cleaning and chemical treatment to the processing parts of each several part.The manufacturing processes that the present invention is complete is various, and the difficulty of processing and welding is big, cleans and the requirements on transport height, therefore, need carry out strict control to making the course of processing.
As shown in Figure 3, the present invention adopts following manufacturing approach.
1) adopts RRR (residual resistivity ratio; The purity of exosyndrome material, for the niobium material of making superconductor cavity, the RRR value of general niobium material is about 40; The requirement of High-purity Niobium material is RRR＞300) value is greater than 300 High-purity Niobium material; Produce two end caps 5 through diel, two arc saddle transition faces of chamber tube 1 and two arcuate flanks, and two thin-walled chamber sheets forming plug 8;
2) go out two cleaning pipes, 3, one center beam tube 10, two end cap beam tubes 6, two flanges 4 and two flanges 7 with machined into; Some chambeies tube reinforcement 12 is accomplished by the line cutting with end cap reinforcement 13;
3) use ultrasonic cleaning equipment, to through step 1) and 2) part accomplished carries out ultrasonic cleaning, and scavenging period is not less than 40 minutes;
4) adopt hydrofluoric acid, nitric acid, phosphoric acid to press the mixed acid of 1: 1: 2 volume ratio composition, the part of accomplishing in the step 3) is carried out chemical cleaning; The acid liquor temperature of chemical cleaning is controlled in 20 ℃, and scavenging period is 10～40 minutes;
5) be not less than the ultra-pure water cleaning step 4 of 16M Ω cm with resistivity) in the part accomplished, and in being superior to 1000 grades clean room, dry;
6) utilize vacuum electron beam welder that the part that obtains through step 5) is welded, the operating voltage of vacuum electron beam welder is 60KV, and operating current is 5～50mA; Welding may further comprise the steps:
(1) with two end cap beam tube 6 respectively correspondence be welded on the two end cap 5;
(2) two thin-walled chamber sheets are welded into plug 8, simultaneously with center beam tube 10 and plug 8 welding;
(3) the two ends correspondence of plug 8 is welded on 2 places, plug hole of 1 two saddle transition faces of chamber tube;
(4) with two the saddle transition faces and the two sides welding of cored bar 8, accomplish chamber tube 1, and chamber tube 1 is carried out shaping through shaping mould;
(5) two end cap 5 is welded on the two ends of chamber tube 1 respectively, forms cavity; Cavity of the present invention need adopt the back of the body forming technique of vacuum electron beam welding to accomplish;
(6) two cleanings are managed 3 corresponding respectively being welded on the two sides of chamber tube 1;
(7) chamber tube reinforcement 12 is welded on the weld of two saddle transition faces and two sides respectively; End cap reinforcement 13 is welded on respectively on two end cap 5 and the two end cap beam tube 6;
(8) flange 4 and flange 7 are welded on respectively on two cleaning pipes 3 and the two end cap beam tube 6;
7) the present invention makes completion.
Above-mentioned manufacturing approach relates to technologies such as machining, drawing, vacuum electron beam welding, ultrasonic cleaning, chemical treatment, and needs to cooperate the microwave property measurement of processing parts to carry out the workpiece quality control.
Outstanding feature of the present invention does, chamber tube 1 is divided into four, punching press respectively, and be welded into complete urceolus, and and unconventional integral body carry out turned welt and welding after rolling the chamber tube.The advantage of doing like this is:
1) the weld seam quantity of minimizing magnetic field peak region reduces the possibility that pyromagnetic quench takes place in the present invention when operation.
2) for the welding between plug and the saddle transition face, can carry out through inner surface in the chamber, because the front of electron beam welding is shaped than the relatively easy control of back-welding shape, can improve the pattern of this part chamber wall inner surface.
3) in addition, reduced the manufacturing procedure of cleaning mouthful two place's turned welts, can once accomplish, reduced cost through punching press.
Above-mentioned each embodiment only is used to explain the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents of on the basis of technical scheme of the present invention, carrying out and improvement all should not got rid of outside protection scope of the present invention.
Claims (1)
1. the manufacturing approach of a single plug radial superconduction accelerating cavity; This list plug radial superconduction accelerating cavity comprises the cylindrical cavity tube; Said chamber tube is made up of two symmetrically arranged saddle transition faces and two symmetrically arranged sides, is respectively arranged with a chamber tube reinforcement between two said saddle transition faces and the two said sides; Be respectively arranged with a plug hole on the two said saddle transition faces, be respectively arranged with a lancing door on the two said sides, two said lancing doors connect a cleaning pipe respectively, and the end that two said cleaning pipes are positioned at the tube outside, said chamber connects a flange respectively; The two ends of said chamber tube are respectively arranged with an end cap, middle part, the surface indent of two said end caps, and the centre wears an end cap beam tube respectively, and two said end cap beam tubes pass two said end caps and connect a flange; On the said end cap beam tube in the two said end cap outsides, be arranged at intervals with some end cap reinforcements; Be provided with a plug between the two said plug holes in the tube of said chamber, said plug is a thin-walled chamber, and its interlude is straight tubular, and two ends are the infundibulate of symmetry, and two said funnel shaped ports correspondence respectively are arranged in the two said plug holes; The interlude of said plug wears a center beam tube, and said center beam tube and two said end cap beam tubes are positioned on the same axis;
The manufacturing approach of above-mentioned single plug radial superconduction accelerating cavity may further comprise the steps:
1) adopts residual resistivity ratio greater than 300 High-purity Niobium material, produce two end caps, two arc saddle transition faces of chamber tube and two arcuate flanks, and two thin-walled chamber sheets forming plug through diel;
2) go out two cleaning pipes, a center beam tube, two end cap beam tubes, four flanges with machined into; Some chambeies tube reinforcement and end cap reinforcement are accomplished in the line cutting;
3) use ultrasonic cleaning equipment, to through step 1) and 2) part accomplished carries out ultrasonic cleaning, and scavenging period is not less than 40 minutes;
4) adopt hydrofluoric acid, nitric acid, phosphoric acid to press the mixed acid of 1: 1: 2 volume ratio composition, the part of accomplishing in the step 3) is carried out chemical cleaning; The acid liquor temperature of chemical cleaning is controlled in 20 ℃, and scavenging period is 10～40 minutes;
5) be not less than the ultra-pure water cleaning step 4 of 16M Ω cm with resistivity) in the part accomplished, and in being superior to 1000 grades clean room, dry;
6) utilize vacuum electron beam welder that the part that obtains through step 5) is welded, the operating voltage of vacuum electron beam welder is 60KV, and operating current is 5～50mA; Welding may further comprise the steps:
(1) with the two end cap beam tube respectively correspondence be welded on the two end cap;
(2) two thin-walled chamber sheets are welded into plug, simultaneously with center beam tube and plug welding;
(3) the two ends correspondence of plug is welded on the place, plug hole of two saddle transition faces of chamber tube;
(4) with two the saddle transition faces and the two sides welding of cored bar, accomplish the chamber tube;
(5) two end cap is welded on the two ends of chamber tube respectively, forms cavity;
(6) two cleanings are managed corresponding respectively being welded on the two sides of chamber tube;
(7) chamber tube reinforcement is welded on the weld of two saddle transition faces and two sides respectively; The end cap reinforcement is welded on respectively on two end cap and the two end cap beam tube;
(8) flange is welded on respectively on two cleaning pipes and the two end cap beam tube;
7) make completion.
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| CN2010105963290A CN102026469B (en) | 2010-12-20 | 2010-12-20 | Single mandril spoke type superconductive accelerating cavity and manufacture method thereof |
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| CN2010105963290A CN102026469B (en) | 2010-12-20 | 2010-12-20 | Single mandril spoke type superconductive accelerating cavity and manufacture method thereof |
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| CN102026469B true CN102026469B (en) | 2012-05-30 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103167718B (en) * | 2013-02-27 | 2015-06-10 | 北京大学 | Single-mandril spoke type superconduction accelerating cavity and manufacture method thereof |
| CN103567726B (en) * | 2013-11-18 | 2015-01-07 | 中国科学院近代物理研究所 | Manufacturing method of superconductor cavity |
| CN104690409B (en) * | 2013-12-10 | 2017-09-29 | 上海新力动力设备研究所 | The welding method of pure niobium cryogenic vacuum pressure vessel |
| CN103716978A (en) * | 2014-01-14 | 2014-04-09 | 中国科学院近代物理研究所 | Half-wavelength superconductive accelerating cavity |
| CN107889337B (en) * | 2017-12-13 | 2024-07-02 | 合肥中科离子医学技术装备有限公司 | Spiral resonant cavity of T-shaped inner conductor of superconducting cyclotron |
| CN110434416B (en) * | 2018-07-04 | 2020-07-28 | 中国原子能科学研究院 | Method for welding different material welding parts of vacuum chamber of superconducting cyclotron |
| CN110757172B (en) * | 2019-11-23 | 2021-07-27 | 常州兴力机车车辆配件有限公司 | Production line of connecting rod bushing marking template and manufacturing process thereof |
| CN111295034B (en) * | 2020-02-27 | 2022-02-11 | 散裂中子源科学中心 | Spoke cavity structure for large hadron accelerator |
| CN113385895B (en) * | 2020-09-29 | 2022-04-26 | 中国科学院近代物理研究所 | High-stability niobium-based superconducting accelerating cavity and preparation method thereof |
| CN113385894B (en) * | 2021-06-10 | 2022-04-26 | 中国科学院近代物理研究所 | Radio frequency superconducting resonant cavity based on high-thermal-conductivity material and high-radio-frequency-performance superconducting material composite board and preparation method thereof |
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